import { asyncRouter, baseRouter } from '@/router/routers';
import cloneDeep from 'lodash.clonedeep';

/**
 * 过滤账户是否拥有某一个权限，并将菜单从加载列表移除
 * @param permission
 * @param route
 * @returns {boolean}
 */
function hasPermission (permission, route) {
  if (route.meta && route.meta.permission) {
    if (permission === undefined) {
      return false;
    }

    let flag = false;

    for (let i = 0, len = permission.length; i < len; i++) {
      flag = route.meta.permission.includes(permission[i]);

      if (flag) {
        return true;
      }
    }

    return false;
  }

  return true;
}

/**
 * 单账户多角色时，使用该方法可过滤角色不存在的菜单
 * @param roles
 * @param route
 * @returns {*}
 */
// eslint-disable-next-line
function hasRole(roles, route) {
  if (route.meta && route.meta.roles) {
    return route.meta.roles.includes(roles.id);
  } else {
    return true;
  }
}

function filterAsyncRouter (routerMap, permissionList) {
  const accessedRouters = routerMap.filter(route => {
    if (hasPermission(permissionList, route)) {
      if (route.children && route.children.length) {
        route.children = filterAsyncRouter(route.children, permissionList);
      }

      return true;
    }

    return false;
  });

  return accessedRouters;
}

const permission = {
  state: {
    routers: baseRouter,
    addRouters: []
  },

  mutations: {
    SET_ROUTERS: (state, routers) => {
      state.addRouters = routers;
      state.routers = baseRouter.concat(routers);
    }
  },

  actions: {
    GenerateRoutes ({ commit }, data) {
      return new Promise(resolve => {
        const { routePermissionsList } = data;
        const routerMap = cloneDeep(asyncRouter);
        const accessedRouters = filterAsyncRouter(routerMap, routePermissionsList);
        commit('SET_ROUTERS', accessedRouters);
        resolve();
      });
    }
  }
};

export default permission;
